package com.ruoyi.framework.config;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Configurable;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.crypto.password.PasswordEncoder;
import org.springframework.security.web.SecurityFilterChain;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import org.springframework.security.web.authentication.logout.LogoutFilter;
import org.springframework.web.filter.CorsFilter;
import com.ruoyi.framework.config.properties.PermitAllUrlProperties;
import com.ruoyi.framework.security.filter.JwtAuthenticationTokenFilter;
import com.ruoyi.framework.security.handle.AuthenticationEntryPointImpl;
import com.ruoyi.framework.security.handle.LogoutSuccessHandlerImpl;
import java.util.Arrays;
import java.util.stream.Stream;

/**
 * Spring Security配置
 *
 * @author 乾乾
 */
@Configurable
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled=true)
public class SecurityConfig {
	/**
	 * 自定义用户认证逻辑
	 */
	@Autowired
	private UserDetailsService userDetailsService;

	/**
	 * 认证失败处理类
	 */
	@Autowired
	private AuthenticationEntryPointImpl unauthorizedHandler;

	/**
	 * 退出处理类
	 */
	@Autowired
	private LogoutSuccessHandlerImpl logoutSuccessHandler;

	/**
	 * token认证过滤器
	 */
	@Autowired
	private JwtAuthenticationTokenFilter authenticationTokenFilter;

	/**
	 * 跨域过滤器
	 */
	@Autowired
	private CorsFilter corsFilter;

	/**
	 * 允许匿名访问的地址
	 */
	@Autowired
	private PermitAllUrlProperties permitAllUrl;

	/**
	 * 升级 AuthenticationManager
	 *
	 * @return
	 * @throws Exception
	 */
	@Bean
	AuthenticationManager authenticationManager(HttpSecurity httpSecurity) throws Exception {
		AuthenticationManager authenticationManager = httpSecurity.getSharedObject(AuthenticationManagerBuilder.class)
				.userDetailsService(userDetailsService)
				.passwordEncoder(bCryptPasswordEncoder())
				.and()
				.build();
		return authenticationManager;
	}

	/**
	 * anyRequest          |   匹配所有请求路径
	 * access              |   SpringEl表达式结果为true时可以访问
	 * anonymous           |   匿名可以访问
	 * denyAll             |   用户不能访问
	 * fullyAuthenticated  |   用户完全认证可以访问（非remember-me下自动登录）
	 * hasAnyAuthority     |   如果有参数，参数表示权限，则其中任何一个权限可以访问
	 * hasAnyRole          |   如果有参数，参数表示角色，则其中任何一个角色可以访问
	 * hasAuthority        |   如果有参数，参数表示权限，则其权限可以访问
	 * hasIpAddress        |   如果有参数，参数表示IP地址，如果用户IP和参数匹配，则可以访问
	 * hasRole             |   如果有参数，参数表示角色，则其角色可以访问
	 * permitAll           |   用户可以任意访问
	 * rememberMe          |   允许通过remember-me登录的用户访问
	 * authenticated       |   用户登录后可访问
	 */
	@Bean
	public SecurityFilterChain securityFilterChain(HttpSecurity httpSecurity) throws Exception {
		// 默认的静态资源
		String[] permitUrl = new String[]{
				"/", "/*.html", "/**/*.html", "/**/*.css", "/**/*.js", "/profile/**",
				"/swagger-ui.html", "/swagger-resources/**", "/webjars/**", "/*/api-docs", "/druid/**"};

		// 配置的放行接口
		if(permitAllUrl.getUrls().size() > 0){
			permitUrl = Stream.concat(Arrays.stream(permitUrl), Arrays.stream(permitAllUrl.getUrls().toArray(new String[0]))).filter(url -> url != null && !url.trim().isEmpty()).toArray(String[]::new);
		}
		httpSecurity.authorizeRequests()
				// 自定义放行接口
				.requestMatchers(permitUrl).permitAll().and()
				// CSRF禁用，因为不使用session
				.csrf().disable()
				// 认证失败处理类
				.exceptionHandling().authenticationEntryPoint(unauthorizedHandler)
				// 记住我功能
//				.and().rememberMe().rememberMeParameter("remember-me").rememberMeCookieName("rememberMe-token")
//				.authenticationSuccessHandler(rememberMeHandler).tokenRepository(secureUserTokenHandler).key("LOVE_REMEMBER")
				// 基于token，所以不需要session
				.and().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
				// 除上面外的所有请求全部需要鉴权认证
				.headers().frameOptions().disable();
		// 添加Logout filter
		httpSecurity.logout().logoutUrl("logout").logoutSuccessHandler(logoutSuccessHandler);
		// 添加JWT filter
		httpSecurity.addFilterBefore(authenticationTokenFilter, UsernamePasswordAuthenticationFilter.class);
		// 添加CORS filter
		return httpSecurity.addFilterBefore(corsFilter, JwtAuthenticationTokenFilter.class).addFilterBefore(corsFilter, LogoutFilter.class).authenticationManager(authenticationManager(httpSecurity)).build();
	}

	/**
	 * 强散列哈希加密实现
	 */
	@Bean
	public PasswordEncoder bCryptPasswordEncoder() {
		return new BCryptPasswordEncoder();
	}
}
